NEET Biology Photosynthesis in Higher Plants Question Bank History of Photosynthesis

  • question_answer
    The scientist, who proved that bacteria use\[{{H}_{2}}S\]gas and\[C{{O}_{2}}\]to synthesize carbohydrate, is

    A) Van Niel

    B) Ruben

    C) Jean Senebier

    D) Julius Robert Mayer

    Correct Answer: A

    Solution :

    In 1930 C.B. Van Niel proved that, sulphur bacteria use \[{{H}_{2}}S\](in place of water) and \[C{{O}_{2}}\] to synthesize carbohydrates as follows : \[6C{{O}_{2}}+12{{H}_{2}}S\xrightarrow{{}}{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{H}_{2}}O+12S\] This led Van Niel to the pastulation that in green plants, water (H2O) is utilized in place of \[{{H}_{2}}S\] and \[{{O}_{2}}\] is evolved in place of sulphur (S). He indicated that water is electron donar in photosynthesis. \[6C{{O}_{2}}+12{{H}_{2}}O\xrightarrow{{}}{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{H}_{2}}O+6{{O}_{2}}\]


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